OpenSAML user discussion

Hi,

I've integrated the JInfoCard Framework into my web application. The 
Framework uses OpenSAML for processing SAML tokens. My implementation works 
on Windows machines, but not on my Debian server. I get a 
NullPointerException in the following line:

XMLObject xmlobj = unmarshaller.unmarshall(elem);

The Debian system is an unstable Debian with Tomcat 5.5, Java 6 and an Apache 
2 Webserver that connects to tomcat via mod_proxy.

I couldn't find any information about my problem anywhere on the net. Does 
anyone have an idea why it doesn't work?

Thanks in advance.

Cheers

Nico